.page-about {
  --about-grid: rgba(122, 156, 198, 0.07);
  -webkit-font-smoothing: antialiased;
  background:
    linear-gradient(var(--about-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px),
    var(--color-deep);
  background-size: 32px 32px;
  color: var(--color-moon);
  font-family: var(--font-serif);
  line-height: 1.75;
}

.page-about .about-hero {
  position: relative;
  padding: var(--space-4) 0 var(--space-6);
  border-bottom: 1px solid var(--color-steel);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 52%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-orange));
  pointer-events: none;
}

.page-about .about-hero__kicker {
  margin: var(--space-3) 0 var(--space-2);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  color: var(--color-amber);
}

.page-about .about-hero h1 {
  margin: 0 0 var(--space-3);
  max-width: 12em;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.6vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--color-white);
}

.page-about .about-hero__lead {
  max-width: 42em;
  font-size: clamp(1rem, 1.55vw, 1.125rem);
  color: var(--color-moon);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3) var(--space-4);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-steel);
}

.page-about .about-hero__stat {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--color-mist);
}

.page-about .about-hero__stat strong {
  display: block;
  margin-bottom: 2px;
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-white);
}

.page-about .about-hero__stat strong span {
  font-size: 0.55em;
  color: var(--color-orange);
}

.page-about .about-hero__visual {
  margin-top: var(--space-4);
  padding: var(--space-2);
  border: 1px solid var(--color-steel);
  background: var(--color-warship);
  max-width: 100%;
}

.page-about .about-hero__years {
  margin-top: var(--space-5);
  font-family: var(--font-mono);
  font-size: clamp(46px, 10vw, 120px);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.06em;
  text-align: right;
  color: rgba(255, 106, 0, 0.13);
  user-select: none;
}

.page-about .about-body {
  padding-top: var(--space-6);
  padding-bottom: var(--space-7);
}

.page-about .about-rail {
  display: block;
  overflow-x: auto;
  white-space: nowrap;
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-steel);
}

.page-about .about-rail__nav {
  min-width: max-content;
}

.page-about .about-rail__link {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-mist);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-about .about-rail__link:not(:last-child) {
  border-right: 1px solid var(--color-steel);
}

.page-about .about-rail__link:hover {
  color: var(--color-orange);
}

.page-about .about-section {
  position: relative;
  margin-bottom: var(--space-7);
  padding-top: var(--space-2);
}

.page-about .about-section :target {
  scroll-margin-top: var(--space-6);
}

.page-about .about-section:target {
  animation: about-target-pulse 0.8s ease;
}

@keyframes about-target-pulse {
  0% {
    background-color: rgba(255, 106, 0, 0.1);
  }
  100% {
    background-color: transparent;
  }
}

.page-about .about-section__head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-steel);
}

.page-about .about-section__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 64px;
  height: 2px;
  background: var(--color-orange);
}

.page-about .about-section__index {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-amber);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.55rem, 2.6vw, 2rem);
  line-height: 1.2;
  color: var(--color-white);
}

.page-about .about-section__intro {
  max-width: 58em;
  margin: 0 0 var(--space-5);
  color: var(--color-mist);
}

.page-about .about-section--timeline {
  padding: var(--space-5) var(--space-4);
  background: rgba(15, 36, 64, 0.35);
  border-left: 2px solid var(--color-orange);
}

.page-about .about-position__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.page-about .about-position__text p {
  margin: 0 0 var(--space-3);
  font-size: 0.98rem;
  color: var(--color-moon);
}

.page-about .about-position__text p:first-child {
  font-size: 1.08rem;
  color: var(--color-white);
}

.page-about .about-position__modes {
  padding: var(--space-4);
  background: var(--color-warship);
  border-left: 3px solid var(--color-orange);
}

.page-about .about-position__modes h3 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  color: var(--color-white);
}

.page-about .about-position__modes ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-position__modes li {
  padding: var(--space-2) 0;
  border-bottom: 1px solid rgba(28, 58, 94, 0.5);
  font-size: 0.95rem;
  color: var(--color-moon);
}

.page-about .about-position__modes li:last-child {
  border-bottom: 0;
}

.page-about .about-position__modes li strong {
  font-family: var(--font-sans);
  color: var(--color-amber);
}

.page-about .about-position__statement {
  margin-top: var(--space-5);
  padding: var(--space-4);
  border: 1px solid rgba(255, 106, 0, 0.24);
  background: linear-gradient(90deg, rgba(255, 106, 0, 0.12), rgba(255, 106, 0, 0.03));
  color: var(--color-moon);
  font-size: 0.98rem;
}

.page-about .about-position__statement::before {
  content: "NOTE / ";
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-orange);
}

.page-about .about-timeline {
  margin: var(--space-5) 0;
}

.page-about .about-timeline__item {
  position: relative;
  margin-left: 6px;
  padding-left: var(--space-5);
  padding-bottom: var(--space-5);
  border-left: 2px solid var(--color-steel);
}

.page-about .about-timeline__item:last-child {
  border-left-color: transparent;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -8px;
  top: 6px;
  z-index: 1;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.18);
}

.page-about .about-timeline__year {
  margin-bottom: var(--space-1);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--color-amber);
}

.page-about .about-timeline__details {
  margin: 0;
  border: 0;
}

.page-about .about-timeline__summary {
  cursor: pointer;
  padding: 0;
  list-style: none;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--color-white);
}

.page-about .about-timeline__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__summary::before {
  content: "+";
  display: inline-block;
  width: 1.5em;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-orange);
}

.page-about .about-timeline__details[open] .about-timeline__summary::before {
  content: "–";
}

.page-about .about-timeline__details p {
  margin: var(--space-2) 0 0 1.55em;
  max-width: 46em;
  color: var(--color-mist);
  font-size: 0.95rem;
}

.page-about .about-timeline__figure,
.page-about .about-capability__figure {
  max-width: 100%;
  margin: 0;
  padding: var(--space-2);
  border: 1px solid var(--color-steel);
  background: var(--color-warship);
}

.page-about .about-timeline__figure {
  margin: var(--space-4) 0 0 auto;
  max-width: 640px;
}

.page-about .about-capability__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.page-about .about-capability__item {
  position: relative;
  overflow: hidden;
  padding: var(--space-4) var(--space-3) var(--space-3);
  min-height: 150px;
  background: var(--color-warship);
  border-top: 3px solid var(--color-orange);
}

.page-about .about-capability__item::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(122, 156, 198, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 156, 198, 0.05) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}

.page-about .about-capability__label,
.page-about .about-capability__value,
.page-about .about-capability__note {
  position: relative;
  z-index: 1;
}

.page-about .about-capability__label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-mist);
}

.page-about .about-capability__value {
  display: block;
  margin-bottom: var(--space-2);
  font-size: clamp(1.4rem, 2vw, 2.05rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-white);
}

.page-about .about-capability__note {
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--color-mist);
}

.page-about .about-capability__extra {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-about .about-capability__detail {
  padding: var(--space-4);
  border: 1px solid var(--color-steel);
  background: rgba(15, 36, 64, 0.5);
}

.page-about .about-capability__detail h3 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-amber);
}

.page-about .about-capability__detail p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-mist);
}

.page-about .about-capability__figure {
  margin: 0;
  max-width: 600px;
}

.page-about .about-boundary__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-about .about-boundary__panel {
  padding: var(--space-4);
  border: 1px solid var(--color-steel);
  background: var(--color-warship);
}

.page-about .about-boundary__panel h3 {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-3);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  color: var(--color-white);
  border-left: 3px solid var(--color-orange);
}

.page-about .about-boundary__panel--off h3 {
  border-left-color: var(--color-amber);
}

.page-about .about-boundary__panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-boundary__panel li {
  position: relative;
  padding: var(--space-2) 0 var(--space-2) var(--space-4);
  border-bottom: 1px solid rgba(28, 58, 94, 0.5);
  font-size: 0.95rem;
  color: var(--color-moon);
}

.page-about .about-boundary__panel li:last-child {
  border-bottom: 0;
}

.page-about .about-boundary__panel li::before {
  content: "—";
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  color: var(--color-amber);
}

.page-about .about-boundary__feedback {
  margin-top: var(--space-5);
  padding: var(--space-4);
  border-left: 3px solid var(--color-cyan);
  background: linear-gradient(90deg, rgba(0, 213, 176, 0.07), transparent);
}

.page-about .about-boundary__feedback p {
  margin: 0 0 var(--space-2);
  font-size: 0.93rem;
  color: var(--color-moon);
}

.page-about .about-boundary__feedback .font-mono {
  color: var(--color-cyan);
}

.page-about .about-boundary__feedback a {
  color: var(--color-amber);
  text-underline-offset: 3px;
}

.page-about .about-boundary__meta {
  color: var(--color-mist);
  font-size: 0.85rem;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-4);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-steel);
}

.page-about .about-links span {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--color-amber);
}

.page-about .about-links a {
  color: var(--color-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.page-about .about-links a:hover {
  color: var(--color-orange);
  border-bottom-color: var(--color-orange);
}

@media (min-width: 640px) {
  .page-about .about-capability__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-section--timeline {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }

  .page-about .about-boundary__layout {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-about .about-position__layout {
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-6);
  }

  .page-about .about-capability__extra {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-capability__figure {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__layout {
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: var(--space-6);
    align-items: start;
  }

  .page-about .about-hero__visual {
    margin-top: var(--space-6);
  }

  .page-about .about-body {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 112px;
    align-self: start;
    overflow: visible;
    white-space: normal;
    margin-bottom: 0;
    padding-top: var(--space-2);
    border-bottom: 0;
    border-left: 2px solid var(--color-steel);
  }

  .page-about .about-rail__nav {
    min-width: 0;
  }

  .page-about .about-rail__link {
    display: block;
    padding: var(--space-2) 0 var(--space-2) var(--space-3);
    border-right: 0;
    border-bottom: 1px solid rgba(28, 58, 94, 0.4);
  }

  .page-about .about-capability__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}